n A tool used to remove material so as to create a hole, typically by plunging a rotating cutting bit into a stationary workpiece.
n Any of several molluscs, of the genus (taxlink|Urosalpinx|genus), that drill holes in the shells of other animals.
n An Old World monkey of West Africa, (taxlink|Mandrillus leucophaeus|species), similar in appearance to the mandrill, but lacking the colorful face.